Ionogels by thiol-ene photopolymerization in ionic liquids: Formation, morphology and properties

Marcinkowska, Agnieszka; Zgrzeba, Anna; Lota, Grzegorz; Kopczyński, Kacper; Andrzejewska, Ewa

doi:10.1016/j.polymer.2018.11.060

Cited by 19 publications

(30 citation statements)

References 53 publications

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“…The influence of ILs and non-ionic solvents on the thiol-ene polymerization we explain in our previous reports [ 11 , 41 ]. The accelerating effect of the solvent on thiol-ene polymerization we attribute to the polarity of the solvent, which can be described by the Kamlet–Taft solvent parameters.…”

Section: Resultsmentioning

confidence: 79%

“…Monodispersity is considered to take place when the particle growth step is long in relation to the nucleation step [ 45 ]. In our previous studies, we also obtained ionogels with the morphology of the connected spheres which we attributed to the stabilizing effect of the IL [ 11 ]. In this study, the mixture of IL and PC was used so the ionic liquid content in the solvent is lower.…”

Section: Resultsmentioning

confidence: 99%

“…This process is widely used for a range of applications (coatings, inks, adhesives, dental materials, photolithographic processes) [ 1 , 2 , 3 , 4 , 5 , 6 ]. Photopolymerization of (meth)acrylates has several drawbacks, including inhibition of the polymerization by oxygen, the presence of unreacted monomer after curing following cure (in the areas not accessible to light), significant shrinkage that occurs during the polymerization process, and the formation of highly heterogeneous polymer networks [ 7 , 8 , 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

“…In our continuing investigations on the preparation and properties of photocurable ionogels with a thiol-ene matrix (based on triallyl ene and trithiol) [ 11 ], we undertook research concerning special hybrid nanofillers, i.e., polyhedral oligomeric silsesquioxanes (POSS). POSS is described by the general formula (RSiO 1.5 ) n or T n (where n is the number of repeat units and T is RSiO 1.5 ) wherein the substituent R can be reactive or nonreactive in the polymerization process [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

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Modification of Thiol-Ene Ionogels with Octakis(methacryloxypropyl) Silsesquioxane

et al. 2021

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The effect of polyhedral oligomeric silsesquioxane (POSS) on the synthesis and properties of hybrid organic–inorganic ionogels was investigated using octakis(methacryloxypropyl) silsesquioxane (methacryl-POSS). Ionogels were prepared in situ by thiol-ene photopolymerization of triallyl isocyanurate with pentaerythritol tetrakis(3-mercaptopropionate) in a mixture of imidazolium ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMImNTf2) and propylene carbonate (PC). Investigations included the kinetics of hybrid materials formation and selected physical and mechanical properties. The disadvantage of ionogels without the methacryl-POSS modifier is leakage and insufficient mechanical properties. Modifying the thiol-ene matrix by the addition of methacryl-POSS made it possible to obtain non-leaking ionogels with improved mechanical and conductive properties. The steric hindrance of POSS cages and high-density network formation played important roles in ionogel synthesis: decrease of polymerization rate (with almost no effect on conversion), as well as dimensions of the formed polymer spheres during dispersion polymerization (highly cross-linked polymer has poorer solubility in polymerizing medium at a similar conversion, and nucleation begins at lower conversion), an increase of glass transition temperature and puncture strength. Hybrid ionogels with high ionic conductivity in the range of 4.0–5.1 mS∙cm−1 with the maximum parameter for 1.5 wt.% addition of the methacryl-POSS were obtained, which can be associated with ion-pair dissociations in ionic liquid clusters caused by methacryl-POSS.

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Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modification of Thiol-Ene Ionogels with Octakis(methacryloxypropyl) Silsesquioxane

et al. 2021

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“…UV-initiated polymerization fits very well with this global trend. Nowadays, UV technology uses a convenient light sources (light-emitting diodes (LEDs), household lamps, LED bulbs, and the sun) [ 13 ] and photopolymerization reactions are encountered in various experimental conditions, i.e., in film [ 14 , 15 ], (micro)heterogeneous media or solid state [ 16 , 17 ], on surface [ 18 , 19 , 20 ], in ionic liquids [ 21 , 22 ], in situ for the manufacture of microfluidic devices [ 23 , 24 ], and under magnetic field [ 25 ]. Relatively rarely the photopolymerization method is used to obtain a liquid polymer or polymer solutions.…”

Section: Introductionmentioning

confidence: 99%

Free-Radical Bulk-Photopolymerization Process as a Method of Obtaining Thermally Curable Structural Self-Adhesive Tapes and Effect of Used Type I Photoinitiators

2020

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A new fabrication method for thin (120 µm) thermally curable structural self-adhesive tapes (SATs) was demonstrated by utilizing a series of acrylic syrups (ASs) modified using Bisphenol A-based liquid epoxy resin. The acrylic syrups containing poly(butyl acrylate-co-butyl methacrylate-co-glycidyl methacrylate-co-2-hydroxyetyl acrylate-co-4-acryloyloxy benzophenone) were synthesized via free-radical bulk-photopolymerization (FRBP) process. Influence of different type I radical photoinitiators (PIs), i.e., α-hydroxyalkylphenones (HPs), acylphosphine oxides (APOs) and its mixtures (HPs/APOs and APO/APO) on selected physico-chemical features of obtained ASs was studied. It turned out that APO-type PIs are more effective in the FRBP process (NMR studies). Self-adhesive tests of SATs revealed that the monomers’ conversion in ASs have a significant influence on adhesion and tack. Moreover, the polymer structures formed at the UV cross-linking stage of SATs significantly affect the cross-linking degree of SATs during thermal curing (differential scanning calorimetry method). The highest values of overlap shear strength were achieved by SATs based on ASs with monomers’ conversion on the level 50–60%.

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Photoinitiators in Various Sectors of Industrial Applications

2021

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Ionogels by thiol-ene photopolymerization in ionic liquids: Formation, morphology and properties

Cited by 19 publications

References 53 publications

Modification of Thiol-Ene Ionogels with Octakis(methacryloxypropyl) Silsesquioxane

Modification of Thiol-Ene Ionogels with Octakis(methacryloxypropyl) Silsesquioxane

Free-Radical Bulk-Photopolymerization Process as a Method of Obtaining Thermally Curable Structural Self-Adhesive Tapes and Effect of Used Type I Photoinitiators

Photoinitiators in Various Sectors of Industrial Applications

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